Rocker for chairs



April 28, 1925.

1,535,298 J. A. DRABlNsK R0 CKER FOR CHAIRS Filed Feb. 9, 1923 `Patented Apr. 28, 1925.

UNITED sra-'rss JOHN 'naaB'iNsKv,v oF'cAMDEN, NEW JERSEY.

aooKEn Foa CHAIRS.

Application ined rebrary 9, `1923. serial No. 618,095.

To all whom it may concern:

Be yit known that I,` JOHN A. DRABINsKY, a'citizen of the United `States of America, residing atCamden, `in the countyfofCamden and State lof New Jersey, have invented new and useful Improvements inl'Rockers for Chairs, of which the following is a specification'.

This invention relates to rockers for chairs, and particularly to rockers which may be adjusted on the legs of ordinary chairs for the purpose of converting the latter into rocking chairs.

The principal object of the invention is to produce a device of this nature which shall be simple of construction, consisting of few parts, easily assembled, cheap to manufacture, and highly eiicient lfor the purpose for which they are designed.

Another object is to produce a rocker which may be conveniently adjusted to fit any desired size of cha-ir within the operative limits of the device.

Another object is to produce a device of this nature which may take care of slight differences in the formation of the bottoms of the legs to which the rockers are attached.

With these and other objects in view as will be more apparent, the invention consists in certain novel construction and combination and arrangen'ient of parts, the essential features of which are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying' drawing, in which Figure l-is a side elevation of a chair having round legs and provided 'with my improvement.

.Figure 2-is a. longitudinal vertical sectional view of one of the rockers.

Figure 3-is a top plan view of one of the rockers.

Figure Lf-is a fragmentary view somewhat similar to Figure 3, vbut showing the device as modified for use with chairs having square legs.

Like characters of reference refer to like parts in all the views.

Referring to the drawing' in detail, 10 represents the ordinary chair structure to which the rockers are to be attached and 11 rep-resents the rocker elements.

Secured to the top of the rocker element and extending longitudinally thereacross is a channelmembe'r' 12 whichis secured to the rocker 11 in any lsuitable manner. Straddling the channel-bar 12 are channel slides 13 'of which there are two oneach rocker. Eachchannel slide is provided with laterally extending ears 14C which are are secured by screws or bolts 15 to bridgepieces 16 and extend underfthe channel bar 12 so as to secure the respective channel slides 13 thereto.

Extending upwardly through each end of each channel slide 13 is a bolt 17, the head of which being in the channel bar 12 locks the bolt against rotation when the nut 18 is screwed down on the bolt 17.

A leg gripping device is adjustably Vsecured on each of the bolts 17 and comprises a horizontal leaf 19 provided with an elongated slot 20 through which passes the bolt 17. A washer 27 is placed on the bolt 17 between the head thereof and the horizontal leaf 19. The gripping member also comprises a vertical leaf 21 to which is secured a curvilinear member 22. The leaves 19 and 21 are hinged at 23. Each member 22 is provided with terminal ears 24 and through the opposed ears is passed a bolt 25 having a right and left hand thread so as to draw the ears together or separate them at the will of the operator. The members 22 may be provided with a lining of felt so as not to mar Ior scratch the leg of the Y chair 10.

In operation, the nuts 18 are loosened and the members 22 are spread apart. The legs are then adjusted in the space between the members 22 and the nuts 18 are then tightened so as to hold the parts in their adjusted position. rIhe screws 25 are now tightened, and owing to the hinge 23, the portions of the members 22 will be drawn towards each other regardless of whether there is a knobby foot or terminal to the chair leg.

In Figure 4 is shown only a slight modification which permits the use of the device with square legged chairs. The only e-lement which is different is the grip member which is here numbered 22a.

IVhile I have described what I deem to be the most desirable embodiment of my invention, it .is obvious that many of the parts may be varied without in any way departing from the spirit of my invention, and I therefore do not limit myself to the exact upper g llo details of construction herein shown nor to anything less than the Whole of my inven tion limited only by the appended claims.

That I claim is l. A rocker for chairs comprising a curvilinear rocker element, a channel bar secured thereto, slide members adjustably secured on said channel bar, and hinged gripping means mounted on said slide members.

2. In a device of the class described, the combination 'of a curvilinear rocker element, a channel bar secured thereto and extending longitudinally thereof, channel slides on said bar7 a member adjustably mounted on each said slide, and a gripping element hingedly secured to each said member.

3. In a device of the class described, the

combination of a rocker element, a channel bar secured thereto and extending` longitudinally thereof, channel members slidably secured on said channel bar, and a plurality of hinged gripping elements on each of said channel members.

Il. A detachable rocker for chairs comprising supports, carrying member adjustable on said supports, clamping members each comprising independent sections including atta-ching plates adjustably carried by said carrying member and chair leg gri pping members hingedly connected to said attachingmembers, and means for connect ing and clamping said chair leg members upon a chair leg.

In testimony whereof I ai'iix my signature.

JOHN A. DRABINSKY. 

